1) The document describes an experiment to study projectile motion by firing steel balls from a ballistic pendulum at different velocities and angles. 2) The experiment aims to determine the relationship between range, height of projection, angle of inclination, and initial velocity. 3) Key measurements involve determining the maximum range and height as functions of initial velocity and angle of inclination using equipment like a meter scale, timer, and two-tier platform. Graphs of experimental data are shown.